Technical Data
B-7.1,2,3,4 -Auto, LitePak Panels
www.DouglasLightingControls.com
Components 7.2
Programmable LitePak Panels
L i t e P a k
Astronomic Function and Photocell Option
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The LitePak controller unit has an astronomic function for dusk-to-
dawn lighting control applications. The latitudes and longitudes for
most North American cities are listed in the manual. This setting is
necessary for the Astronomic function to work properly.
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The astro function permits offsets of up to 180 minutes from the
calculated time of sunset and sunrise. Thus, lights can be
switched before or after sunset and sunrise if desired.
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The astro function can also be combined with the time function to
permit lights to be switched on at sunset, off at a later hour, on at
an early hour and off after sunrise.
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Connecting a WPS-5527K photo sensor (optional) to the LitePak
controller permits precise numeric settings for the ON and the
OFF setpoints. Each output can have a unique setpoint.
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Care must taken to install the sensor at a location that measures
natural and not artificial light. Usually best results are obtained by
pointing the sensor to the northern sky. Sensor range is from 0-
6,500 footcandles. Lower settings (less than 100 footcandles) are
used for dusk-to-dawn applications and higher settings are used
for daylighting applications (Ex: skylights).
Stand Alone Panel
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Install LitePak panel near breaker panel and connect up to eight
circuits (for 8-relay models) or sixteen circuits (for 16-relay
models) to the panel (20A @120/277V lighting load rated relays).
The largest wire size that can be used is 10 AWG.
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LitePak panels are pre-wired so that each relay (for 8-relay
models), or a set of 2 adjoining relays (for 16-relay models) is
connected to one of the 8 outputs of the controller. In this
configuration, each relay, or relay pair, can have its own program.
In applications where several relays are to be controlled by the
same program, connect the relay's red control wires to a single
output. Up to 4 relays can be controlled by an output of the
controller.
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The LitePak panel permits manual override of the relays by:
1) The membrane keypad of the controller.
2) Manual on/off levers built into the relays.
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Use the keypad and interactive graphic display menus to enter,
view and edit programs. In most cases the instruction manual
should not be necessary to make simple adjustments to
schedules, light levels and time settings.
L i t e P a k
CONNECTIONS
Optional Remote Switching
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If accessing the LitePak panel for override switching is
inconvenient, install a remote switch station convenient to the
occupants.
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All Douglas 2 wire relay switches are compatible. Indicating, non-
indicating and key operated switches are available. Up to 3
switches can be installed in a wall box to permit compact stations.
Off-white plastic and stainless steel cover plates are available.
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Individual Switching:
Connect the red control wire from the switch to the relay. The
switch is connected in parallel to the controller output. Several
switches can be installed at the same or multiple locations
as required.
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Group Switching:
The LitePak controller has one group switch input that can be
used to switch all or some of the outputs of the controller.
Expansion Panel(s)
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To expand a system, install a LitePak expansion panel.
Expansion panels have no controller or transformer installed.
Only relays are installed and they are controlled by the panel
housing the controller.
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An eleven (11) wire bus ensures that all connection
combinations are possible.
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The outputs of a LitePak controller each can switch a maximum
of 4 relays. There are 8 outputs, thus a theoretical maximum of
32 relays can be controlled. If more than 24 relays are to be
controlled, it is recommended that full-sized, Douglas relay
panels be considered. Panels of up to 72 relay capacity are
available and they can be connected together to form even
larger systems.
Panel with LitePak
Expansion Panel connected
Stand Alone Panel
Built-in Overrides
Panel with Remote
Switches Connected
Panel with Remote
Photo Sensor
Remote
Photo Sensor
Remote
Switches
L i t e P a k
L i t e P a k
L i t e P a k
L i t e P a k
11
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